fix: update Vuex playlist store whenever the show changes

This might have been called at some other point in the past and got lost
in translation.

src/main.js

@@ -2,7 +2,7 @@ import { defineDefaultAPIStoreOptions } from '@rokoli/bnb/drf'
 import BootstrapVue from 'bootstrap-vue'
 import { merge } from 'lodash'
 import { createPinia } from 'pinia'
-import { createApp, watchEffect } from 'vue'
+import { createApp, watch, watchEffect } from 'vue'
 import VueToast from 'vue-toast-notification'
 import VueLogger from 'vuejs-logger'
 
@@ -67,4 +67,13 @@ watchEffect(async () => {
   }
 })
 
+watch(
+  () => store.getters['shows/selectedShow'],
+  (show) => {
+    if (show) {
+      store.dispatch('playlists/fetch', { showSlug: show.slug })
+    }
+  },
+)
+
 void authStore.init()